Which of the following may explain the failure to observe Population III stars?
A. The first stars to be formed in the young Milky Way were very massive and therefore short-lived.
B. We do not expect to observe Population III stars, because pure hydrogen and helium stars never formed.
C. Population III stars are shrouded by gas and dust, making them difficult to see.
D. None of these choices is correct.
Answer: A
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Fill in the blank(s) with correct word